Do the pigments used pose any allergy problems?

You can develop an allergy to anything at anytime. However, documented allergies to permanent cosmetic procedures are extremely rare. There have been very few reactions to pigments and only rarely in the case of blue-based red pigments.

Who benefits from permanent cosmetics?

active people who want to look their best for activities such as swimming, hiking, biking, tennis, or aerobics and don’t want to worry about “sweating off” or reapplying cosmetics; and those with motor impairments such as arthritis, Parkinson’s disease, multiple sclerosis, or stroke survivors with unsteady hands who cannot apply traditional makeup.